Causes and solutions of high temperature solenoid valve failure

Causes and solutions of high temperature solenoid valve failure

　　 1. The solenoid valve terminal is loose or the thread is off, the solenoid valve must not be energized, and the thread can be tightened.

　　 2. Air leak. Air leakage will cause insufficient air pressure, making it difficult for the solenoid valve to force the valve to open and close. The reason is that the sealing gasket is damaged or the slide valve is worn, which causes blow-by in several cavities.

　　3. When dealing with the solenoid valve failure of the switching system, the appropriate time should be selected, and the solenoid valve should be dealt with when the solenoid valve is de-energized. If the processing is not completed within a switching gap, the switching system can be suspended and handled calmly.

　　4. The solenoid valve coil is burnt out, you can remove the wiring of the solenoid valve and measure with a multimeter. If it is open, the solenoid valve coil will burn out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing excessive current in the coil and burning. Therefore, the magnetic level gauge must prevent rainwater from entering the solenoid valve. In addition, if the spring is too hard, the reaction force is too large, the number of turns of the coil is too small, and the suction force is not enough to cause the coil to burn. For emergency treatment, you can turn the manual button on the coil from the "0" position to the "1" position during normal operation to open the valve.

　　 5. The solenoid valve is stuck. The matching clearance between the spool valve sleeve of the solenoid valve and the valve core is very small (less than 0.008mm), and it is generally a single-piece assembly. When mechanical impurities are brought in or there is too little lubricating oil, it is easy to get stuck. The treatment method can be made by inserting a steel wire through a small hole in the head to make it rebound. The fundamental solution for the gas solenoid valve is to remove the solenoid valve, take out the valve core and valve core sleeve, and clean it with CCI4 to make the valve core move flexibly in the valve sleeve. When disassembling, pay attention to the assembly sequence of the components and the position of the external wiring, so that the reassembly and wiring are correct, and check whether the oil spray hole of the lubricator is blocked and whether the lubricating oil is sufficient.

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